If you build a 15-40 lb rifle, you will not want a break open.
If you build a 15-40 lb rifle, you will not want a break open.
Don Verna
I don’t trust the program as much as some people might. I’ve seen it show different pressure and higher charges than published data. I worked down under 1 grain without the program. Seating deeper is what I was missing.
The program shows dramatic pressure changes with deep seated boolets and minuscule charges. I intend to make very small changes and probably at least ten loads for one test sample. I don’t know that I’ll have the courage to go to the limit the program predicts.
It sounds like to me if you were to find a H&R / NEF Ultra Slug Gun model SBS 980 and have a 24”liner barrel turned to insert in the 12 ga. you would have pretty close to what you want to make.
The USG has a very heavy 24” barrel already and with a 12 ga. Liner it would even be heavier plus you would have 2 calibers 12 ga. Rifled bore plus 9 mm or whatever you want the liner chambered in.
A working extractor would be hard to make for it but you are not looking for a fast repeating rifle anyhow so it could be made simply as a finger nail eject.
Jedman
Last edited by Jedman; 04-11-2024 at 03:47 PM.
BP | Bronze Point | IMR | Improved Military Rifle | PTD | Pointed |
BR | Bench Rest | M | Magnum | RN | Round Nose |
BT | Boat Tail | PL | Power-Lokt | SP | Soft Point |
C | Compressed Charge | PR | Primer | SPCL | Soft Point "Core-Lokt" |
HP | Hollow Point | PSPCL | Pointed Soft Point "Core Lokt" | C.O.L. | Cartridge Overall Length |
PSP | Pointed Soft Point | Spz | Spitzer Point | SBT | Spitzer Boat Tail |
LRN | Lead Round Nose | LWC | Lead Wad Cutter | LSWC | Lead Semi Wad Cutter |
GC | Gas Check |